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hex108 commented on YARN-2405:
------------------------------
If RMApp has not been accepted by scheduler, it will only be recorded in `Map<ApplicationId,
RMApp> rmContext.getRMApps()`. So I think we could first test whether it is in `Map<ApplicationId,
SchedulerApplication> applications`, then we decide whether to get its fair. Is it OK?
> NPE in FairSchedulerAppsBlock (scheduler page)
> ----------------------------------------------
>
> Key: YARN-2405
> URL: https://issues.apache.org/jira/browse/YARN-2405
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Maysam Yabandeh
>
> FairSchedulerAppsBlock#render throws NPE at this line
> {code}
> int fairShare = fsinfo.getAppFairShare(attemptId);
> {code}
> This causes the scheduler page now showing the app since it lack the definition of appsTableData
> {code}
> Uncaught ReferenceError: appsTableData is not defined
> {code}
> The problem is temporary meaning that it is usually resolved by itself either after a
retry or after a few hours.
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